/* This test checks that the stack is properly extended even if
   the first access to a stack location occurs inside a system
   call.

   From Godmar Back. */

#include <string.h>
#include <syscall.h>
#include "tests/vm/sample.inc"
#include "tests/lib.h"
#include "tests/main.h"

void test_main(void)
{
    int handle;
    int slen = strlen(sample);
    char buf2[65536];

    /* Write file via write(). */
    CHECK(create("sample.txt", slen), "create \"sample.txt\"");
    CHECK((handle = open("sample.txt")) > 1, "open \"sample.txt\"");
    CHECK(write(handle, sample, slen) == slen, "write \"sample.txt\"");
    close(handle);

    /* Read back via read(). */
    CHECK((handle = open("sample.txt")) > 1, "2nd open \"sample.txt\"");
    CHECK(read(handle, buf2 + 32768, slen) == slen, "read \"sample.txt\"");

    CHECK(!memcmp(sample, buf2 + 32768, slen), "compare written data against read data");
    close(handle);
}
